Diaphragm anchoring means



. Myl', '1951 J. A. cHYBA 2,550,672

, DIAPHRAGM ANCHORING MEANS Filed March 5, 1948 2 Sheets-Sheet 1 l W y Mfr l 27 I 44 1 I J 35 .34

/ lll yglz, l 30 Uhu' 2l 29 INVENToR. fasfP/s/ A. 6205A BY May l, 1951 J, A CHYBA 2,550,672 A DIAPHRAGM ANCHORING MEANS Filed March s', 1948 v.2 Sheets-Sheet 2 Patented May 1, 1951 DIAPHRAGM ANCHORING `MEAN S Joseph A. `Chyba, Baltimore, Md., assignor to Hydro-Form Corporation, Baltimore, Md., a

corporation of Maryland Application March 3, 1948, Serial No. 12,871 e Y 4 Claims.

` choring a flexible diaphragm within a shapeforming device. y Other objectsp and advantages ofthe present invention will appear throughout the following specication and claims.

In the drawings:

Figure 1 is a side elevational view of the shapeforming device,` certain parts being shown in section to illustrate the diaphragm-anchoring means;

Figure 2 is a side elevational View partly in section, of the diaphragm before it is placed in the shape-forming device;

Figure `3 is a side elevational View of the diaphragm-,retaining ring; Figure 4 is atop plan view of the diaphragmretaining ring, partly in section and lillustrating one ofthe pressure jports;

vEigurel 5 .is .a top'plan View of the lower `ret/ainingv ring of the shape-forming device;

Figure 6 is a bottom plan view of the dom reducedpin size;

Figure 7 is a bottom plan view of the diaphragm-retaining ring reduced in size;

Figure Sis a fragmentary transverse sectional View of .the diaphragm-retaining ring.;

rFigure 9 is .a fragmentary sectional view illusp tra'tng a modied form of the diaphragm-anclrrinameans:

'Figure 10 is a fragmentary sectional View of thesealing gasket Vshovvn in Figure 9;

Figure 1l is a bottom plan View of a dome of a different shape from that shown in Figure 5.

By referring to the drawings, I designates the dome which is provided with a pressure compartment The dome I0 is provided with a recess I 2 into which fits a removable diaphragm-retaining ring I3. The upper wall of the recess I2 is provided. with an annular 'channel I4 for receiving the annular tongue I which is carried by the upper face `of the ring I3. This ring `I3 is provided with radiating pressure Yports I 6 extending from the inner through the outer face or `periphery of the ring |3-see' Figures 1, 3 and 4. The-ring I3 is providedwith a plurality of annular beads I1 uponl the upper face thereof exteriorly :of thef tongue. The 'ring I3.:is provided 2 with an enlarged annular channel I-B .in its lower face and also a plurality of .inwardlyspaced concentric beads I9 upon the under face thereof. The inner lower edge .is preferably rounded to prevent the cutting of the flexible diaphragm 21| as the diaphragm flexes. As shown in Figure l, the diaphragm 2| closes the lower end of the pressure compartmentl I-| A lower retaining vring 22 is clamped upon the bottom of the dome I0 by means of 'bolts 23, and a'spacer 24 is preferably interposed between the abutting faces of the dome |I) andthe ring i252. The ring 22 is provided with an annular channel 25 upon its upper face in opposed relation to the channel |8 of the ring I3, as shown in Figure 1.

The ring 22 is also provided with a series 0f .conlcentric inwardly spaced beads 26 inwardly of the channel 25 and in opposed relation to the beads |9 of the ring I3. 'The ring 22 is provided with acentral opening `2'! for receiving the die member D.

A speciallyformed flexible diaphragm or flexible shape-forming member 2|, preferably `of rubber or other suitable material, is anchored in position by the Arings |-3 and 22. This diaphragm 2| is provided with a depending annular lbead 28 which fits into the channel. 25 of the ring 22 and is also provided with ank upstanding bead 29 which fits in the channel I8 of the ring I3, `as shown in Figure 1. The kbeads I'I and 26 grip the flexible and compressible diaphragm 2| therebetween to provide a tooth-like or interftting serrated rgripping action upon the diaphragm 2|. The diaphragm 2| is provided with an upstanding peripheral flange 30 which terminates in an inturned annular flange 3| having an inclined lower wall 32 which wall 32 ts snugly upon the inclined face 13a of the ring I3. The inwardly protruding end of the flange 3| ts snugly be tween the beads I1 'of the ring 3 and the anchoring beads |'Ia of :the dome I0 which are arranged in opposed relation to the beads I1 to provide a tooth-like .grip upon the ange`3| located therebetween. The flange 3l is `arranged in spaced relation to the body of the diaphragm thereby defining a .diaphragm which is substantially U-shaped in cross-section along its periphery, the ange 3| providing an inwardly extending overhanging ledge. Y

Pressure from the compartment II will pass through the ports I6 during operation, and by contacting the inner face of the flange 30 this pressure will force the flange 30 tightly against the vertical wall 33 of the dome l0 to provide a furtherfeflcient seal. As shown .in Figure '1; a

the diaphragm-anchoring means wherein 34 l designates the dome having a pressure compartment 35. The dome 34 is provided with a suitably formed recess 36 in its under face arranged laterally of the compartment 35. The dome -34 is also provided with a bead-receiving channel 31 which is located in opposed relation to the bead 38 carried by the upper face of the lower diaphragm-retaining ring 39. The ring 39 is clamped in position by bolts 40 similar to the bolts 33 andg'a spacer 4| similar to the spacer 24 is interposed between the dome 34 and ring 39 at the periphery thereof.v The kflexible diaphragm 42, preferably-of"r rubber, Vcloses the open end of the compartment 35 and the periphery of the diaphragm 42 is clamped between the dome 34 and the ring 39. The :.bead'38fforces. 4the-'adja- Y within the channel 3S and snugly engages the upper face of the diaphragm 42. A spacer ring 45 fits in the recess 36 and between the lips 44a and the sealing gasket 43. The spacer ring 45 is provided with ports 45 which provide communication 'between the pressure compartment 35 and the channel 36, in a manner whereby the pressure from the compartment 35 will force the gasket tightly against the walls of the channel 36 and in sealingl contact with the diaphragm 42. The spacer ring 45 is provided with anvannular tongue I5a similar to the tongue I5 shown in Figure 1, and this tongue I5a fits in the annular groove |4a formed in the top wall of the recess 36, similar to the channel I4 in the recess l2 shown in Figure 1. The spacer 4| is of a developed or pre-computed thickness to control pressure on the diaphragm 42 as the ring A39 is clamped-against the dome 3| and the diaphragm It should benoted that the rigid spaced ring or member |3 will exert constant pressure upon the flange 3|' 'when clamped in position, and that l variable pressure Will pass through the ports I6 against the upstanding ange 3U to seal the diaphragm against pressure escaping from the pres# sure compartment. This also is true with respect to the structure shown in Figure 9.

The space-r ring 45 is also of a pre-computed thickness so as to compress the lips 44a a denite amount to eiiiciently seal these lips 44a against the top wall of the recess 36 and the top face of the diaphragm 42. These lips 44EL when so compressed will prevent any leakage of liquid at the time of each cycle of operation. When no pressure is present, the seal becomes relaxed. 'I'his spacer ring 45 retains just the amount of pressure to hold the lips 44a in a proper position, one against the dome, and the other against the diaphragm and to thereby prevent leakage of oil. In Figure ,11, l have shown a dome, 4 1 which is 4 similarly constructed to the dome I0. The dome 41 and its associated parts are similarly designed as to shape to properly interfit. It is not desired to limit the invention as to shape or design, since various shapes maybe employed without departing from the spirit of the' invention, to produce the desired shaped articles which are formed thereby. Y,

Having described the invention, what is claimed as new is: `1. A diaphragm-anchoring means of the class described comprising opposed diaphragm-engaging members, means securing the members together, one member having a pressure compartment, a diaphragm-retaining ring carried by one member, a flexible diaphragm closing said comflange arranged in spaced relation relative to the 'body of the diaphragm thereby defining a spaced inwardly extending overhanging ledge, said ring tting upon the diaphragm and under the flange and overhanging ledge, and said diaphragm-engagingmembers and said diaphragm-retaining ring.y having opposed intertting serrated dia# -phragm-gripping means to engage the diaphragm and flangeto hold the diaphragm in an anchored position.

l *2. -A diaphragm anchoring means of the class described comprising opposed diaphragm-engaging members, means securing the members together, one member having a pressurecompartment, a diaphragm-retaining ring carried by one member, a flexible diaphragm'closing said compartment and having an inwardly extending ange arranged in spaced` relation relative to the body of the `diaphragm thereby defining a spaced inwardly extending overlianging ledge, said ring fitting upon the diaphragm and under the flange and overhanging ledge, said diaphragm-engaging members and said diaphragm-retaining ring having opposed intertting serrated diaphragmgripping means to engage the diaphragm and flange to hold the diaphragm in an anchored position, opposed lbeads formed upon the upper and ylower faces of said diaphragm, and said ring and one of the members having opposed channels for receiving said beads to provide a tongue and groove gripping action.

3. A diaphragm anchoring means of the class described comprising opposed diaphragm-engaging members, means securing the members together, one member having a pressure compartment, a diaphragm-retaining ring carried by one member, a flexible diaphragm closing said compartment and having an inwardly extending flange arranged in spaced relation relative to the body of the diaphragm thereby defining a spaced inwardly extending overhanging ledge, said ring fitting upon the diaphragm and under the'fiange and overhanging ledge, said diaphragm-engaging members and said diaphragm-retainingvring having opposed intertting serrated diaphragmgripping meansv to engage the diaphragm and flange to hold the diaphragm in an anchored position, opposed beads formed upon the upper and lower faces of said diaphragm, said ring and one of the members having opposed channels for receiving said beads to provide a tongue and groove gripping action, the rst mentioned member having a channel, and said ring having-an upstanding flange fitting in said chanel.

4. A diaphragm-anchoring 'means comprising a plurality of opposed gripping members, one of the members having a pressure compartment, a exiblediaphragm closing isaid pressure compart;;

ment, a flexible sealing element for said diaphragm, a rigid spacer engaging said sealingy element and exerting constant pressure against one portion of the sealing element to 'bind the sealing element against one of the gripping memf. 5 bers, means for directing variable pressure from j the pressure compartment against another por'- tion of said sealing element to seal the flexiblevv l sealing element and the diaphragm against the escape of pressure from the pressure comparten, ment, means for securing the gripping members'v 1, together, and a second spacer of developed thickf ness interposed between the gripping members to maintain constant clamping pressure on the dia- Dhragm. f

JOSEPH A. CHYBA.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES kPATENTS 

